Java 如何在 JasperReports 中使用条件 TextField？
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How can I use a conditional TextField in JasperReports?
提问by Jonas
I would like to have a pair of TextFields depending on a value. And the "y"-value should be adjusted depending on the empty space.
我想要一对取决于值的 TextFields。并且“y”值应根据空白空间进行调整。
When the value is "0"I would like to hide the TextField.
当值为 时，"0"我想隐藏 TextField。
I.e. I would like to hide the staticTextand the textFieldif the parameter redis equal to "0"and have the blue values moved up, in the jrxml-code below:
即我想隐藏staticText和textField如果参数red等于并向上"0"移动蓝色值，在下面的 jrxml 代码中：
<staticText>
<reportElement x="100" y="30" width="100" height="30"/>
<text><![CDATA[Red items:]]></text>
</staticText>
<textField>
<reportElement x="200" y="30" width="40" height="30"/>
<textFieldExpression>
<![CDATA[$P{red}]]>
</textFieldExpression>
</textField>
<staticText>
<reportElement x="100" y="60" width="100" height="30"/>
<text><![CDATA[Blue items:]]></text>
</staticText>
<textField>
<reportElement x="200" y="60" width="40" height="30"/>
<textFieldExpression>
<![CDATA[$P{blue}]]>
</textFieldExpression>
</textField>
Example of output:
输出示例：
//if blue = 3 and red = 2 if blue = 3 and red = 0 if blue = 0 and red = 2
Red items: 2 Blue items: 3 Red items: 2
Blue items: 3
These TextFields will be placed at the end of my report. How can I do this?
这些 TextFields 将放置在我的报告的末尾。我怎样才能做到这一点？
采纳答案by Bozho
<reportElement ...>
<printWhenExpression><![CDATA[$P{red} == 0]]></printWhenExpression>
</reportElement>
You can use iReport to modify this with a pleasant UI.
您可以使用 iReport 以令人愉悦的 UI 对其进行修改。
回答by medopal
In this way, no, I'm not sure it's possible.
这样，不，我不确定这是否可能。
There is an option called Remove Link When Blank, but it only works if you want to remove the whole line. Here you want to remove one line in specific column.
有一个选项叫做Remove Link When Blank，但它只有在你想删除整行时才有效。在这里，您要删除特定列中的一行。
In this case I would recommend using crosstabor CrossTables feature.
在这种情况下，我建议使用crosstab或 CrossTables 功能。
Give the Column Group the value of X. (supposing X is the column number) And give the Row Group the value of the color field, from here you can change the label dynamically, something like this:
给 Column Group 的值 X。（假设 X 是列号）并给 Row Group 颜色字段的值，从这里您可以动态更改标签，如下所示：
$F{color}==null?"": ($F{color}.equals("RED")?"Red Items":"Blue Items")
回答by techGaurdian
you can use like this
你可以这样使用
Declare RED as [class="java.lang.Number"]
while printing
打印时
$P{red}.intValue() == 0 ? null : $P{red}.intValue()
and enable Blank when null option of the field using
并启用空白时字段的空选项使用
textField isBlankWhenNull="true">
<reportElement x="100" y="30" width="100" height="30" isRemoveLineWhenBlank="true"/>
